Knitting machine



March 30, 1937. H. B. AARoNsoN 2,075,077

. KNITTING MACHINE Filed July 5, 1934 l Y I ivucm/wfa 'Patented Mar. 30, 1937 UNITED STATES KNITTING MACHINE l Harry B. Aaronson, Camden, N. J., assignor to H. Brinton Company, Philadelphia, Pa., a corporation of Pennsylvania Applicatie July s, 1934, seri/a1 No. 733,691

7 claims. (ci. ca -ml My invention relates to a knitting machine and more particularly to knitting machines' of the type shown in Ames Patent j1,722,989, August 6,

1929 (now Reissue 17,705), wherein individual.

needle'operation is Acontrolled by means of a trick wheel which is the subject matter of Ames Patent 1,780,328, November 4, 1930. It is an object of my invention to provideymeans associated with said trick wheel whereby the stitch length may be controlled in correlated relation with the control of the action of the individual needles, this being of particular importance in the knitting of certain mesh patternswherein a ribbed fabric is provided with perforations or enlarged openings at predetermined points, but it will also be found useful in other relations.

Referring to the drawing, which is made a part of this application and in which similar reference characters indicate similar parts:

Fig. 1 is an elevation showing a part of a cir cular knitting machine with my invention applied thereto, and

Fig. 2, a similar elevation looking outward from the axis of the machine and showing a stitch cam and parts coacting therewith.

In the drawing, reference character Ill indicates the cam ring of a circular knitting machine, on which cam ring is mounted a stitch cam II, normally held in the elevated position shown in full lines in Fig. 2, by means of a spring I2 surrounding a screw I3. 'The head of the screw limits the upward movement of the stitch cam which is secured to a post I4 which post has av plate I5 at its upper end.

With the cam I I in the position shown, stitches of a certain length will be drawn and if it should be desired to make longer stitches in some of the courses the cam may be moved downward toward or to the dotted line position illustrated in Fig. 2. For this a lever I6 is pivoted at Il on the cam ring, said lever having one end arranged to bear on the plate ,I5 and having at its other end an adjustable screw I6', the screw resting at its lower end ona horizontal arm of a vertically slidable member I8 whose up and down movement is guided by means of screws I9 having threaded engagement with the stitch ring or a suitable part thereof, there being slots in the slide to permitthe same to move with reference to the screws. At its lower end the slide has an enlarged foot 2l.

Below the foot 2I there is a pattern wheel, which obviously may be made up in various ways, but which is here shown as of the type in Patent 1,780,328 wherein the body of the wheel is provided with slots to receive strip-like elements 22 (so-called tricks) having butts 23 which are preferably frangible so that they may readily be moved selectively for pattern purposes. It will be seen that these butts, as in the previous patent, are spaced onlyv slightly from one another, the intervals' between the butts being much less than the vertical width of the butts and the active faces of the butts being necessarily at their` outer ends. As in the patents referred to, the tricks may be h eld in place by means of a spring ring 24. At its upper end the pattern wheel is provided with a removable ring 25, in the upper face of which ring there are formed a number of apertures 26 adapted to receive pins 2.1 which may be removed or replaced to change the stitch length in desired'courses, without any need to remove the ring from the wheel. The ring is preferably set into an annular recess in the top of the wheel, but may be attached in any of the other Ways obvious to a mechanic. In the preferred form of the invention'the apertures are screw threaded and the pins are provided with threads-to secure them in place but Vthis'is not necessarily so. Itis also within the contemplation of my invention that the ring 25 may be an integral part of the body of the trick wheel. The trick wheel is rotated about a vertical axis at 28 by means such as shown in Ames Patent 1,722,989. It will be understood, as in the case of lthe patents referred to, that the trick wheel can be indexed once for each course or may remain in one position while a number of courses are knitted and that the stitch length is therefore uniform vthroughout at least one course of stitches.

It will be obvious to those skilled in the art that my invention may be applied to machinesother than a circular knitting machine of the type illustrated and that the invention may be utilized 'with pattern wheels of other character than the trick wheel shown in the drawing. Various other changesvwill also be obvious to those skilled in the art and therefore I do not limit myself to what is shown in the drawing and described in the specication butonly as indicated in the appended claims.

Having' thus fully described my said invention, what I claim as new and desire to secure by Letters Patent is:

1. In an independent needle knitting machine of the type having a slotted needle cylinder, needles therein, a cam ring, a longitudinally slotted trick wheel having its axis parallel to that of the needle cylinder, and removable striplike tricks in the slots of the wheel, the combination of a stitch cam on said ring, means normally holding the stitchcam in elevated position, lugs arranged about the axis of said trick wheel, a

' 5 slide on the cam ring so positioned as to be movable by said lugs. and a lever operable by said slide to depress said stitchgycam.

f 2. In an independent needle knitting machine of the type having a slotted -needle cylinder,

needles therein, a 'cam ring, a longtiudlnally slotted pattern wheel having its axis parallel to that of the needle cylinder, pattern strips in the slots of -thefwheel and intentionally frangible butts on said strips, the combination of a stitch cam on said ring, mea/ns normally holding the stitch cam in elevated position, a lever for depressing said stitch cam, a slide on the cam ring arranged to actuate said lever, and means on the trick wheel for raising said slide to depress 2o the stitch cam.

E I 3. In an independent needle knitting machine of the type having a slotted needle cylinder,

needles therein, a camring, a trick wheel having its axis parallel -tcthat of the n'eedle cylin der, and frangibjle buttsfprojecting radially from said wheel whereby therneedles are selectively controlled, the combination of a stitch cam on said ring, means normallyholding the stitch cam in elevated position, and means operable vfromithe means on said wheel formoving said stitch cam to vary the length of the stitches drawn in predetermined courses.

5. In a circular independent needle knitting machine, a needle cylinder, a cam ring, a stitch cam on said ring, a pattern wheel rotatable about an axis parallel to that of the needle cylinder, pattern indications on the periphery of the wheel selectively controlling the action of individual needles',operating connections from said pattern wheel to said stitch cam, and means extending axially of said pattern Wheel for adjusting said stitch cam through said connections at predeneedles, a trick wheel parallel to the needle cylinder and lugs on the periphery of-the trick wheel. whereby the action of individual needles is selec:

tively determined, the combination of a stitch cam on said ring, resilient means for holding the stitch cam in elevated position, a series' of lugs on the upper end of `the trick wheel concentric with the axis of the Wheel, and connections from said lugs to the stitch cam for depressing the same.

' l HARRY B. AARONSON. 

